Spring cushion for presses



Oct. 1'0, 1931.

F. J. RQDE SPRING CUSHION FOR PRESSES Filed Jan. 30, 1929 2 Sheets-Sheet 1 Oct. 13, 1931. F. J. RODE 1,827,440

SPRING CUSHION FOR FRESSES Filed Jan. 30, 1929 2 Sheets-Sheet 2 Jib/avian" Wye/ V Patented Oct. 13, 1 931 UNITE-DSTATES- Fenian-Ion J. onn,- OF CHICAGO; rnnnvors,:Assreiion ro'mnnoonrrn TOOL 8n, MFG. compan or onroneo, ILLINOIS, A- co'nronem onon rrmrnors it sPRINe oiismon r03 rnnssns I Application mkii liu'ary so, 1929., Serial in. 336 0.3(

is employed a dieor work holding element which is movable under the action of a reoiprocable rain. Apressure pad or: plate is also usually employed'which is movable with said die or work holding element and the pad is resisted in its movement, in one'direction by a cushion .formedof springs, and thejde sired amount of resistance has been obtained by providing a sufficientnumber of springs.

In some instancesand in order to produce the desired" amount of resistance pressure to the 'pad, a plurality, of springs. have been;

superposed, which requires a considerable amount of space in the form of a deeppit l under the press to accommodate the springs.

- This is objectionableinasmuch as it sometimes becomes necessary to adjust the springs andit has been very inconvenient and some} tim-esalmost impossiblefor the workmen to gain access to thesprings orfpa rts ofthe press which are located injth'e deep pit. V .Furthermorethe rate-of increase of pressure on longsprings isless than that of short springs, therefore it vhas been necessary here} tofore, in order, to get the desired pressure,

to end.

, It is one of the objects of. the present in vention to provide an improved spring cushion of this character inwhich short springs may be; employed by arranging or locating the springs beside each other, with all of the springs disposed above the fioo-r, thereby materially reducing the depth of pit necessary,

' and at the same oily accessible. 1

' To the attainment of these endsi aiid tlie accomplishment-of other new and useful {ob jects as will appear,,the invention .c'onsi'stsin' the features of, novelty in substantially the construction, combination and arrangement I "any desired orv suitable manner preferably by to superpose the springs or arrange thenr'end I i i tionary partof the press.

Interposed, between the support 18and the time the Springs l havthe housing or abutment member floats Same eif t asvlfvtheyt are pe ip s and, the 7 e Ween 1e support 18 and the bolster l t a spri gs and co-operatingparts will be read is secured t the s p r i g preferablycby ve'ntion, and in which companying drawings illustrating this in- H Figure 1is a view partly in front elevation, partly in section, and partly broken away of a sheet metal press having a spring 55 cushien constructed inaccorda nce with the. principles of this invention applied thereto.

F gure2 is' a detail sectional view taken on line 22, Figure 1, with the parts of'the spring cushionin one position.

'1' F gure 3 is a view similar to the parts in another position.

60 Figure 2, with "Figure 1 is a detail top plan view of the 2' housing or abutment member forthe springs.

Referring more particularly to the draw- 65' ings, the nui'nera'l 1O designates the bed of a 1 press, 11 the uprights, 12 a reciprocab-le ram, 1

13 a reciprocable die member'connected with i i the ram, 14 a die member with which the die 1 13 co-operatesrlo the'bed or bolsterplate'of 7( a, press, 16a pressure pad or pin plate and 17 pins or members which support the die 14 and which. loosely pass through the bed or bolster plate 15and engage and rest upon the pressure pad 16.- i

of the abovereferred to parts are of the ordinaryand well known construction.

DISPOSGd-bG'lOW the bed of the press. is-a support 18 which may'. be held in position'in 16 ,v is a spring housing or abutment member 20, any number of which may be providedv accord ng topthe number of. springs necessary and the size of the press. f

15 and is supported bymeans of springs 21, I

f One-end Of whi h" engage and rest upon'the Y s pp rt 18., V V.

. .The springs and aremaintained against displacement in I anysuitable manner preferably by means of rods or members 22, one end of each-of which passing :therethrou'gh "and upon the ends of 2l arearranged sidebyside g5 i which rods beneath the support are nuts or collars 23.

The housing or member 20 is provided with recesses 2% opening through the lower face thereof and into which recesses the springs 21 extend, the upper ends of the springs abutting the bottom of the respective recesses. The rods 22 pass loosely through the top of the member 20 and the pressure pad :16 may be provided with recesses 25 opening through its bottom face in alinement with the ends of the rods 22 so that when the pressure pad 16 is lowered the ends ofthe rods will enter these recesses and thereby not interfere with the lowering movement of the pressure pad.

The housing or abutment member 20 is also provided with recesses 26 opening through its upper face and any number ofthese recesses 26 may be provided, according to the number springs to be employed. Secured to and depending from the pressure pad 16 are rods 2? which pass through the respective recesses 26 and. also through the bottom oftherecesses and project beyond the lower face of themember 20. These rods 27 also pass through suitable openings in the support 18 whereby the support 18 will form a guide for the lower ends of the rods. Encompassing each of the rods 27 is a spring 28, one end of each of which abutsthe bottom of the respective recesses 26 and the other ends abut the bottom of the pressure pad or plate 16, the springs 28 encompassing the respective rods 2.7 and through which springs the rods 27. are freely movable.

Obviously the shape of the member 20 will be determined by the number of springs employed.

WVith this improved construction itwill be manifest that the housing or abutment member 20 willbe. supported for'fneeo-r floating movement between the bolster plate .15 and the support 18.

It will also be manifest that with this construction the springs may be arranged side by side and the necessity of a deep pit willfbe obviated, it only being necessary to provide a comparatively shallow pit 29 in which the ends of the rods 27 project when the pressure pad 16 is lower-ed.

In operation, the pressure pad 16 will be maintained in its uppermost position as shown in Figure 2,'when the press isnot in operation, by the stress of the springs 21-and 28. T The normal tendency of the springs21 is to elevate the'housing or abutment plate 20 while thesprings28 in turn have a normal tendency to return the pad 16 to its normalposition andhold the same in such positionuntil it is depressed.

When the ramdescends and the die -memberlt is depressed the pressure pad 16 will also be depressed through the medium of the pins 17.tending to compress the springs 28 and thereby lower the housing or abutment member 20. The lowering movement, however, of the housing is resisted by the action of the springs 21 being compressed by such movement of the housing or member 20, thereby producing the required and a predetermined amount of resistance against the lowering movement of the pressure pad 16. All of the springs are of substantially the same resistance stress,*with the "resultthat there will .he 113.11 even blank holding pressure throughout the cycle of movement of the pres surepad against the stress of the springs,

which is ofgreat importance in machines of this character.

It will also be manifest that the springs will be disposed above the floor and will be readily accessible.

By varying the number of springs and'by the combinationand arrangement of the several parts, within the scope of the claims,

without departing from the spirit of this invention.

What is claimed as new is *1. In combination, a press, a reciprocable ram, a pressurepad with which the ram co operates, a cush1on for reslsting the movement of the pad in one direction, said cushion embodying an abutment member, a fixedsup- .port, and between which support. and pad 1' said member is disposed, springs, .the opposite ends of which engage the said abutment member and said pad, and additional springs,the-opposite ends of whichlatter respectively engage said abutment member and said support, all of said springs being'of substantially the same resistance stress.

2. "In combination, a press, a reciprocable ram, a pressure pa d with which the ramcoopera-tes, a cushion for resisting themovement of the "pad in one direction, said cushion port, and between which support and pad sald member is d1sposed,. springs, the-opment member and said pad, and additional springs, the opposite ends of which latter respectively engage said abutmentrmember and said support, the said abutmentmember springs, all of said springs being of substantially the same resistance stress.

3. In combinatiomfla'press, a *rec-i-procable ram, a pressure pad with which the ram cooperates, a cushionforresi-sting the moveembodying an abutment member, a fixed supposite ends of which engage the said abutbeingyieldingly supported by the last recited ment of the pad in one direction, said cushion embodying an abutment member, a fixed support, and between which support and pad said member is disposed, springs, the op? posite ends of which engage the abutment member and said pad, and additional-springs, the opposite ends ofwhich latter respectively engage said abutment member and said support, the proximate portions of said springs being housed within said abutment member, all of the springs being of substane tially the same resistance stress.

4. In combination, a press, a reciprocable ram, a pressure pad withwhich the ram cooperates, a cushion for resisting the movement of the pad in one direction, said cushion embodying an abutment member, a fixed support, and between which support and pad said member is disposed,springs, the opposite substantially the" same resistance stress.

5. Aspring cushion for presses, said cushion embodying a floating abutment member, a plurality of spr ngs arrangedslde by side,

- all of said springs being of substantially the same resistance stress,'one end of each of the springs' engaging said abutment member, the other ends'of some of the springs engaglng a stationary element onone side oflthe said member, and the other ends of others of the V springs engaging a movable member on the side of the abutment member opposite to said stationary element and which movable memtowards the said stationary M 1 wards said support, all of said springs will-r her is movable element.

6. A spring cushion for pressesembodying a stationary support, a pressure pad spaced therefrom and movable towards and away wards and terminate short of said pad, a set of springs one end of which engage said pad and extend towards and terminate short of said support, and a floatingabutment member interposed between the other ends of the two sets of springs and engaged thereby whereby both sets of springs will be compressed when said pad is moved towards said support, all of said springs being of substan tially the same resistance stress. a

7. A spring cushion for presses embodying a stationary support, a pressure pad spaced therefrom and movable towards and away from the support, a set of springs one end of. which engage said support and extend towards and terminate short of said pad,a set of springs one end of which engage said pad I and extend towards and terminate short of two jsetsi of: springs; and engaged-thereb whereby both 2 sets fof springs willl ibe, com pressed' iwhen sa dpad is moved towards,said 1 sup-tatt e re pec iv p i fo the Sets be i ing outiofalinementfand substantiallypa'raliwitheach other,;a11; esaia springsbeing of substantiallytheisame resistance stress.

' "8. A 'sp'ring cushion for presses embodyin a stationary support, 'a pressure padspaced therefrom' and] movable towards and away 'from the support, In floating abutment member interposed between 'thesupport andpad v and spaced "from "both," said member having recesses opening'through opposite faces thereo sp ings ateain the recesses which throughbne fa ce'of the memberand engagingsaid supportfandisprings seated in the assesse which open through the opposite faceof'thej abutment andengaging-the said pad, whereby, when said pad, is moved towards' fsaid support, all of said {springs will beicompres'sed, all ,of said springs being of, substantially thesame resistance stress.

1 9. A spring cushion for presses embodying astationary support, a'ypre'ssure' pad spaced therefrom and movable towards and away. from the support, a floatingabutm ent mem-v ber interposedfbetween the support and pad and space'd'from bothpsaid,member' having recesses opening, through opposite faces 5" thereof,the'recesses'opening through one face of the abutment being out of alinement with the recesses opening through the other face thereof, springs seated in the recesseswwhich 7 open through one face of the member and o engaging said support, and springs seated in the recesses which open through the opposite face of the abutment and engaging the said pad, whereby'whensaid pad is moved to-' be compressed, all-of-said springs being of v substantially the same resistance stress. 10. A spring cushion for presses embodying a stationary support, a pressure pad spacedtherefrom and movable towards andj llfl away from the support, a floating abutment member interposed between the-sup ort and V pad and spaced from both, said mem er having'recesses' opening through opposite faces thereof, springs seated in 'the recesses which open through one face of the member and engaging said support, and springs seated in the recesses which open through the opposite face of the abutment and engaging the said pad, whereby when said pad is moved, to-f'lZO wards said support, all of s aid springs will becompressed, the said springsbeing arrang ed side by side, all of said springs being of substantially the same resistance stress;

11. A spring cushion for presses embody-Q 12 ing a stationary support, a pressure pad I spaced therefrom and movable towards and i is away from" the support, a floating-abutment f member interposed between the support and a pad and spaced fromboth, springs arrangedifgifi 5 issu ewsp i ide of end sn agi gssai r u m r t t sp n Q1 e d )Q sv i i-eb i m n ialso ne si s the said supp r and the springs oh the other side of, the abi tment also en gagihgsaid pad, whereby when the pad is moved towardssaid support the stress ofall of said springsryvillbe exerted upon said psd, [all of. saiol v springs] being of substantially the same resistariee stress.

12. A springeushion tor presses embodying a stationary support,.e pressurepaclspeced therefrom and movahletowards and' awzxy vfrom the ,support,. a fioeting abutment memb i pp d wes the po and p d and spzuged from both a d springs arranged on opposite sides of and engaging said abutmerit, the springs on one side of said ebut ment, also engaging the. said 1 support vzm'ol the springs on the other side of the abutment, also engaging said pad, whereby When thepad is moved towerd'ssaid supportthe stress' of all of said springs will be exerted uponseid pa d, the springs on one side oftheebutment. being out of. alinement with and 1 overlapping ,the springson theiopposite sidethereof, all of saidsprings being of. substantially the same resistance stress.

In testimony whereof .I have signedmy "name to this .s eeification, on this 25th Clay 7 0i January,

929. V E EDR QH RQDE 

